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gitea/services/webtheme/webtheme.go
wxiaoguang b79e3db264
Initial support for colorblindness-friendly themes (#30625)
Initial support for #25680

This PR only adds some simple styles from GitHub, it is big enough and
it focuses on adding the necessary framework-level supports. More styles
could be fine-tuned later.
2024-04-24 00:18:41 +08:00

75 lines
1.9 KiB
Go

// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package webtheme
import (
"sort"
"strings"
"sync"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/public"
"code.gitea.io/gitea/modules/setting"
)
var (
availableThemes []string
availableThemesSet container.Set[string]
themeOnce sync.Once
)
func initThemes() {
availableThemes = nil
defer func() {
availableThemesSet = container.SetOf(availableThemes...)
if !availableThemesSet.Contains(setting.UI.DefaultTheme) {
setting.LogStartupProblem(1, log.ERROR, "Default theme %q is not available, please correct the '[ui].DEFAULT_THEME' setting in the config file", setting.UI.DefaultTheme)
}
}()
cssFiles, err := public.AssetFS().ListFiles("/assets/css")
if err != nil {
log.Error("Failed to list themes: %v", err)
availableThemes = []string{setting.UI.DefaultTheme}
return
}
var foundThemes []string
for _, name := range cssFiles {
name, ok := strings.CutPrefix(name, "theme-")
if !ok {
continue
}
name, ok = strings.CutSuffix(name, ".css")
if !ok {
continue
}
foundThemes = append(foundThemes, name)
}
if len(setting.UI.Themes) > 0 {
allowedThemes := container.SetOf(setting.UI.Themes...)
for _, theme := range foundThemes {
if allowedThemes.Contains(theme) {
availableThemes = append(availableThemes, theme)
}
}
} else {
availableThemes = foundThemes
}
sort.Strings(availableThemes)
if len(availableThemes) == 0 {
setting.LogStartupProblem(1, log.ERROR, "No theme candidate in asset files, but Gitea requires there should be at least one usable theme")
availableThemes = []string{setting.UI.DefaultTheme}
}
}
func GetAvailableThemes() []string {
themeOnce.Do(initThemes)
return availableThemes
}
func IsThemeAvailable(name string) bool {
themeOnce.Do(initThemes)
return availableThemesSet.Contains(name)
}